What is Weekly Active Users (WAU)?
Weekly Active Users (WAU) is the number of unique users who engage with a product at least once within a 7-day period. It sits between daily active users and monthly active users as a measure of engagement frequency, often used for products with a natural weekly usage rhythm.
TL;DR
Weekly Active Users is the number of unique people who used a product at least once in a 7-day window, a middle-ground engagement measure for products people naturally use on a weekly rather than daily rhythm.
Formula
WAU = Count of Unique Users Active in a Trailing 7-Day Period
Why It Matters
Weekly Active Users matters because it fits the natural usage pattern of many products better than daily or monthly measures do, since tools like project management software, weekly reporting dashboards, or planning apps aren't meant to be opened every single day, but shouldn't sit unused for a month either. Tracking WAU alongside DAU and MAU also reveals engagement patterns that either extreme would hide on its own, since a healthy WAU with a low DAU to WAU ratio might simply reflect a product's natural weekly rhythm rather than a genuine engagement problem. Comparing how WAU moves after a feature launch or product change is also one of the clearest ways to see whether that change is actually pulling users back more consistently.
Example
A product logs 45,000 unique users engaging with it at some point during a given week. If that number climbs to 52,000 the following week after a new feature launch, while daily active users barely move, that pattern suggests the feature is drawing existing users back more often within the week rather than attracting large numbers of brand-new users, a distinction that comparing WAU against DAU and MAU over the same period helps clarify.
Frequently Asked Questions